Wikipedia save as epub: fix some image download failures
Wikipedia save as epub: fix some image download failures

houqp/koreader,Markismus/koreader,mihailim/koreader,Frenzie/koreader,lgeek/koreader,poire-z/koreader,mwoz123/koreader,Hzj-jie/koreader,koreader/koreader,pazos/koreader,NiLuJe/koreader,poire-z/koreader,apletnev/koreader,NiLuJe/koreader,koreader/koreader,Frenzie/koreader